Laminar Air Flow Cabinet is a work bench or similar enclosure, which creates a particle-free working environment by taking air through a filtration system and exhausting it across a work surface in a laminar or unidirectional air stream. The laminar flow cabinet is enclosed on the sides and kept under constant positive pressure in order to prevent the infiltration of contaminated room air.
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Laminar flow cabinet is widely used in medical research laboratories, hospitals, manufacturing facilities and other research and production environments.
How does Laminar Air Flow work ?
The concept of laminar flow involves the ability of fluid particles to move in a smooth path, with each layer moving parallel to the other. This concept has been utilized in the design of many aerodynamic and hydrodynamic systems to make them more efficient by reducing friction drag.
Characteristics of Laminar Air Flow
Laminar is characterized by smooth streamlines and highly ordered motion. Under most practical conditions, the flow in a circular pipe is laminar for Re < 2000. In fully de$eloped laminar flow, each fluid particle moves at a constant axial velocity along a streamline and the velocity profile remains unchanged in the flow direction.
The steady laminar flow of an incompressible fluid with constant properties in the fully developed region of a straight circular pipe.
Laminar flow in a straight pipe may be considered as the relative motion of a set of concentric cylinders of fluid, the outside one fixed at the pipe wall and the others moving at increasing speeds as the center of the pipe is approached.
Smoke rising in a straight path from a cigarette is undergoing laminar flow. After rising a small distance, the smoke usually changes to turbulent flow, as it eddies and swirls from its regular path.
